What is Fabric Weight?

Fabric weight is one of the most practical textile measurements for consumers, yet it's rarely discussed outside of the fashion industry. The GSM number tells you exactly how thick and substantial a fabric is: a lightweight cotton tee might be 120-150 GSM, a standard dress shirt 100-140 GSM, a heavy sweatshirt 350-450 GSM, a denim jacket 350-500 GSM, and a winter coat fabric 400-600+ GSM. Understanding these ranges helps you make smarter purchasing decisions — you can gauge warmth, durability, and appropriate season before touching the fabric. For clothing shoppers, fabric weight serves as a quality indicator in many categories. In T-shirts, a 180+ GSM cotton tee is noticeably more substantial and longer-lasting than a 120 GSM fast-fashion tee — it drapes better, shows less transparency, maintains its shape through more washes, and generally feels more premium. In suiting, 240-280 GSM is the year-round sweet spot; below 200 GSM suits are summer-only; above 300 GSM is winter suiting. In denim, 12-14 oz (roughly 400-475 GSM) is the standard range; raw selvedge denim typically runs heavier at 14-16 oz. Fabric weight also determines how a garment drapes and moves. Lightweight fabrics (under 150 GSM) flow and float — ideal for blouses, scarves, and summer dresses. Mid-weight fabrics (150-300 GSM) hold their shape while still moving naturally — ideal for most year-round garments. Heavyweight fabrics (300+ GSM) provide structure, warmth, and substance — ideal for outerwear, heavy knitwear, and cold-weather bottoms. TRY helps you build a wardrobe that covers the full weight spectrum, ensuring you have appropriately weighted garments for every season and context — from lightweight summer layers to substantial winter pieces.

Two visually similar black T-shirts at the same price point: one is 130 GSM and the other is 200 GSM. The 130 GSM tee is semi-transparent, clings to the body, and will thin out after 20 washes. The 200 GSM tee is fully opaque, drapes cleanly, and will maintain its shape for years. The weight difference is invisible in a photo but transformative in wear.